#include "pwm.h"

void pwm_config(void)
{
    timer_oc_parameter_struct  timer_ocintpara;
    timer_parameter_struct     timer_initpara;

    rcu_periph_clock_enable(RCU_TIMER2);

    timer_deinit(TIMER2);

    /* TIMER1 configuration */
    timer_initpara.prescaler         = 107;
    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
    timer_initpara.period            = 15999;
    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
    timer_initpara.repetitioncounter = 0;
    timer_init(TIMER2,&timer_initpara);

    /* CH1,CH2 and CH3 configuration in PWM mode1 */
    timer_ocintpara.ocpolarity   = TIMER_OC_POLARITY_HIGH;
    timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;
    timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;
    timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
    timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;
    timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
    timer_channel_output_config(TIMER2,TIMER_CH_2,&timer_ocintpara);
    timer_channel_output_config(TIMER2,TIMER_CH_3,&timer_ocintpara);

    /* CH1 configuration in PWM mode1,duty cycle 25% */
    timer_channel_output_pulse_value_config(TIMER2,TIMER_CH_2,0);
    timer_channel_output_mode_config(TIMER2,TIMER_CH_2,TIMER_OC_MODE_PWM0);
    timer_channel_output_shadow_config(TIMER2,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);

    /* CH2 configuration in PWM mode1,duty cycle 50% */
    timer_channel_output_pulse_value_config(TIMER2,TIMER_CH_3,0);
    timer_channel_output_mode_config(TIMER2,TIMER_CH_3,TIMER_OC_MODE_PWM0);
    timer_channel_output_shadow_config(TIMER2,TIMER_CH_3,TIMER_OC_SHADOW_DISABLE);

		timer_primary_output_config(TIMER2,ENABLE);
    /* auto-reload preload enable */
    timer_auto_reload_shadow_enable(TIMER2);
    timer_enable(TIMER2);
}
